Lime-kiln



(ModeL) A. BARRON.

Limekiln...

'No. 227,203. Patented May 4, 18 80.

.UNITED STATES PATENT OFFICE.

ANDREW BARRON, 0F JANESVILLE, WVISOONSIN.

LIME-KILN.

SPECIFICATION forming part of Letters Patent No. 227,203, dated May 4,1880.

Application filed March 1, 1880.

To all whom it may concern:

Be it known that 1, ANDREW BARRON, of J anesville, in the county of Rockand State of Wisconsin, have invented certain new and usefulImprovements in Lime-Kilns, of which the following is a specification.

I have improved what is known as the annular or tower lime-kiln, inwhich the firepot has a series of radial flues; and the objects of myimprovements are to provide means for obtaining a more effective draftin the use of a portable railway-furnace; to provide an an nular vaultedor arch way around the flues of the fire-pot in connection with an outerflue, wall, or shell inclosing said archway, with the fines in eacharranged in radial coincident positions and opening into said archway,wherein and between said flues the furnace or furnaces are operated toobtain the full draft through the surrounding. shell-flue. according tothe direction of the wind. The outer-wall or shell flues are alwaysopen, giving light and air to the archway, within which the furnace orfurnaces are operated, while the fire-pot flues are temporarily closed,except such as may-be supplying the necessary combustion for the oven.Under this construction the furnace is operated between the inner andouter vertical walls of the kiln, giving it a position in relation tothe fire-pot to obtain the full effect of the flame from the furnacedirectly upon the stone to be calcined, yet obtaining the advantage ofdouble non-conductin g walls. In fact I use the ordinary double wallswithin and between which to form an annular tramway, within which thefireman operates the furnace, said tramway intersecting the radialflues, and in this way afford facilities for changing the position ofthe furnace to suit the direction of the wind, obtain the advantage ofan outside tunnel draft-flue for the furnace, a covering for the outerflue ends of the fire-pot, and a direct action of the products ofcombustion within the oven from the furnace.

I attain these objects by the construct-ion hereinafter described, andshown in the accompanying drawings, in which- Figure 1 represents anelevation of my improved kiln; Fig. 2, a vertical section taken on theline 00 w, and Fig. 8 a horizontal seo tion on the line y y.

' an effective draft to the furnace.

(ModeL) The kiln is of annular form, in which the inner wall, A, of theoven B is of brick, the outer wall, 0, of masonry, and an intermediatefilling, l), of sand or other suitable nonconducting material. It isbuilt upon a foundation, G, of masonry, having a tunnel, H, into whichthe products of calcination from the oven are discharged.

The oven B has a pot-shaped truncated bottom, a, opening into a centralpassage, 1, which communicates with the base tunnel H, and is providedwith a slide, J, for the discharge of the calcined products. The centralpassage, I. is pierced by the radial fire-pot flues b, which, however,only extend to the outer side of the inner brick wall, A, of the oven.These flues are made to flare inward as much as possible, so as to givea wide flame and expose the stone as much as possible to the action ofthe fire, the contents of the oven being kept from falling into theflues by firebrick placed within the flaring ends of the flues and builtinto the top and bottom of said lines, as shown in Fig. 3.

Themiddlenon-conducting wall, D, does not extend to the foundation G,but is supported by an arch, K, Fig. 2, extending around between andbuilt upon the inner and the outer walls, and with sufficient headwayand passageway to form an annular tramway, c, for the furnace E orfurnaces in being shifted from one flue, b, to another, to suit thedirection in which the wind is blowing, to allow of the operations ofthe fireman, and to uncover the flues, so that theyextend only throughthe fire-pot wall.

The outer wall, 0, like the oven-wall, rises from the foundation andforms the annular archway L around the fire-pot flues. It is providedwith draft-fines M, formed by arched openings in coincident positionswith the firepot flues b, so that the furnace being placed in positionwith the flue b is thereby also placed in position opposite the outer.flue, M, or be.- tween two flues, in which the outer .one gives Theseouter arched draft-openings give light and air to the annular archway,While the outer shell, within which the draft-openings are formed,covers and protects the fire-pot wall.

It will be noticed that the archway is formed ner and the outer wallsshortens the flatnefiues and brings the furnace nearer the tirepotopening I, which is an advantage of much importance in obtainingthe fullbenefit of the heat from an outside tramway-furnace.

These draft-openings M are of greater area than the fines b, to giveingress and egress to the archway, and it is by these outer-wallflues oropenings and the archway that I am enabled to use a tramway-furnaceinside of the walls of a kiln, instead of around the outerside, asheretofore. One or more furnaces may be used of suitable constructionand provided with tramway wheels for travel upon the track, as may berequired for use with any particular flue or fines, the fines not in usebeing closed by removable cast-iron doorsd. (Shown in Fig. 3.)

The stone isdulnped into the ovenby means of ordinary staging and(lumping apparatus, and the products of calcination being dischargedwithin the ibundationtnnnel H may be conveyed away by an endless chainor apron operated in any suitable manner.

I claim.

1. The inner and the outer walls of a tower lime-kiln, separated attheir junction with the foundation to form an annular vaulted or archway, L, within which the oven-fines I) open,

and within which the tramway-furnace E is arranged to connect saidfurnace with said flues, substantially as and for the purpose herein setforth.

2. The outer shell or wall of a tower limekiln, provided withdraft-fines or openings M, coincident with the oven-fines b, incombination with the tramway-furnace E, arranged to connect with saidoven-fines opposite the outerwall draft fines or openings and within anannular archway formed between the inner and the outer walls,substantially as and for the purposes herein set forth.

3. A tower lime-kiln in which the tramwayfurnace is inclosed within anannular vaulted or arch way formed by and between the inner and theouter Walls, the fines and draft-openings wherein are coincident and onopposite sides ofthe furnace track, said draft-openings in the outerwall being of greater area than the coincident oven-fines, and the saidarchway having snfficient headway and passage-way to allow of shiftingthe position of the furnace in relation to the oven-fines,substantiallyas and for the purposes herein set forth.

In testimony whereof I have hereunto set my hand.

' ANDREW BARRON.

WVitnesses:

B. F. DUNWIDDIE, A. L. WICKHAM.

